ADELAIDE, Australia — After returning to top-level cycling, Lance Armstrong has set himself a new challenge by saying he intends to compete in the Hawai‘i Ironman.

The 38-year-old Armstrong was targeting the 2011 or 2012 event on the Big Island, depending upon whether this year or next will be his final Tour de France.

"I will be in Kona 15 months after the final Tour," Armstrong told Australian Associated Press on Friday. "If it's 2010, then it will be Kona 2011. If it's 2011, it will be Kona 2012."

The Texan is in Australia preparing for the Tour Down Under race to kickstart a year in which he is aiming for an eighth Tour de France title - this time with Team Radio Shack which he co-owns.